Marty McFly: Nice shot Doc! You're not going to believe this, we have to go back to 1955.
Doc: I don't believe it!

If my calculations are correct, when this baby hits eighty-eight miles per hour... you're gonna see some serious shit.

Dr. Emmett Brown

Young Doc: No wonder this circuit failed. It says "Made in Japan".
Marty McFly: What do you mean, Doc? All the best stuff is made in Japan.
Young Doc: Unbelievable.

Marty McFly: Hey, Doc! Where you going now? Back to the future?
Doc: Nope. Already been there.

Biff Tannen: You're supposed to be in Switzerland, you little son of a bitch!
Marty McFly: My father?
Biff Tannen: Did you get kicked out of another boarding school? Damn it, Lorraine, do you know how much perfectly good dough I blow on this no-good kid of yours, huh? On all three of them!
Lorraine Baines: What the hell do you care? We can afford it! The least we can do with all that money is provide a better life for our children!

Dr. Emmett Brown: 1.21 jigawatts? 1.21 jigawatts! Great Scott!
Marty McFly: [following] What the hell is a jigawatt?

Marty McFly: [Reading newspaper in 2015] "Within two hours of his arrest, Martin McFly Jr. was tried, convicted and sentenced to fifteen years in the state penitentiary." In two hours?
Doc: The justice system works swiftly in the future now that they've abolished all lawyers.

Doc: Marty, you're not thinking fourth dimensionally!
Marty McFly: Yeah, I know, I got a real problem with that.

Hey Dad, George. Hey, you on the bike!

Marty McFly

Dr. Emmett Brown: Are those my clocks I hear?
Marty McFly: Yeah! Uh, it's 8 o'clock!
Dr. Emmett Brown: Perfect! My experiment worked! They're all exactly 25 minutes slow!
Marty McFly: Wait a minute. Wait a minute. Doc... Are you telling me that it's 8:25?
Dr. Emmett Brown: Precisely.
Marty McFly: Damn! I'm late for school.

I have your car towed all the way to your house and all you've got for me is *lite* beer?

Biff Tannen

Lou: You gonna order something, kid?
Marty McFly: Ah, yeah... Give me a Tab.
Lou: Tab? I can't give you a tab unless you order something.
Marty McFly: All right, give me a Pepsi Free.
Lou: You want a Pepsi, pal, you're gonna pay for it!

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